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The acidophilic microorganisms diversity present in lignite and pit coal from Paroseni, Halânga, Turceni mines

Author(s): Carmen Madalina CISMASIU

Journal: Analele Universitatii din Oradea, Fascicula Biologie
ISSN 1224-5119

Volume: TOM XVI;
Issue: 2;
Start page: 60;
Date: 2009;
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Keywords: acidophilic bacteria | coal | biodesulphurization

Pollution from coal combustion is the largest problem in the current use of coal and the biggest constraint on the increased use of coal. When these fossil fuels are combusted, sulphur-di-oxide is released into the atmosphere causing acid rains which dissolves buildings, kills forest. Knowing the physiological groups of microorganisms present in the coal samples has an ecological importance, completing the knowledge in the field of the microorganism’s ecology and a practical importance, being a source of new microorganisms with biotechnological potential. The microbial communities evidenced in such sites include both groups of chemolithotrophic microorganisms involved in the metals biosolubilization processes and groups of heterotrophic microorganisms involved in the processes of bioaccumulation or biofixation of metallic ions. In this context, this paper presents the study regarding the main physiological groups of microorganisms present in the pit coal and lignite samples after the industrial processing of coal. The results revealed that the microorganisms belonging to the following physiological groups: aerobic heterotrophic acidophilic bacteria, strictly anaerobic heterotrophic (sulphur-reducing), nitrifying bacteria (nitrite and nitrate bacteria), denitrifying bacteria and acidophilic chemolithotrophic bacteria on Fe2+, on S0 and on S2O3.
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